descriptive grammar
linguistic work describing the actual state of a linguistic system at a particular epoch of its development
en-GB/dɪˈskɹɪptɪv ˈɡɹæmə/
en-US/dɪˈskɹɪptɪv ˈɡɹæmɚ/
linguistic work describing the actual state of a linguistic system at a particular epoch of its development